Merge pull request #70 from darkrockmountain/dependabot/go_modules/do…

…t-examples/serverless/google_cloud_functions/github.com/darkrockmountain/gomail-0.6.0

chore(deps): bump github.com/darkrockmountain/gomail from 0.6.0-beta to 0.6.0 in /.examples/serverless/google_cloud_functions